<template>
  <view>
    <my-search @click="gotoSeach()"></my-search>
    <view class="scroll-view-container" >
      <!-- 左侧滚动 -->
      <scroll-view scroll-y="true" :style="{height:wh + 'px'}" class="left-scroll-view">
        <block v-for="(item,i) in cateList" :key="i">
          <view  @click="activeChanged(i)"
          :class="['left-scroll-view-item', i == active ? 'active' : '']" >{{item.cat_name}}</view>     
        </block>
        
      </scroll-view>
      <!-- 右侧滚动 -->
      <scroll-view scroll-y="true"  :scroll-top="scrollTop"
      class="right-scroll-view" :style="{height:wh + 'px'}">
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <view class="cate-lv2-title">
            {{item2.cat_name}}
            
          </view>
          <view class="cate-lv3-list">
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3">
              <image :src="item3.cat_icon" @click="gottoGoodsList(item3)"></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
          
        </view>
        
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        // 窗口高度
        wh:0,
        // 分类列表
        cateList:[],
        //默认选中项
        active:0,
        //二级分类
        cateLevel2:[],
        scrollTop:0,
      };
    },
    
    onLoad(){
      // 获取系统信息
      const sysInfo = uni.getSystemInfoSync()
      this.wh = sysInfo.windowHeight - 50
      this.GetCateList()
    },
    methods:{
      async GetCateList(){
        const {data : res} = await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message
        this.cateLevel2 = res.message[0].children
      },
      //一级分类点击事件
      activeChanged(i){
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        // 切换scrolltop
        this.scrollTop = this.scrollTop === 0? 1 : 0
      },
      gottoGoodsList(item3){
        uni.navigateTo({
          url:'/subpkg/good_list/good_list?cid=' + item3.cat_id
        })
      },
      // 跳转搜索页面（分包）
      gotoSeach(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
    
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      line-height: 60px;
      background: #f7f7f7;
      text-align: center;
      font-size: 12px;
      
    
    &.active{
      background-color: #ffffff;
      position: relative;
      
      &::before{
          content: '';
          display: block;
          width: 3px;
          height: 30px;
          background: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
  .cate-lv2{
    padding-top: 5px;
    .cate-lv2-title{
      font-size: 12px;
      text-align: center;
      letter-spacing: 18px;
      color: #000000;
      font-size: 22px;
      margin: 0 20px 5px;
      padding: 10px 0;
        border-bottom: 2px solid #efefef;
    }
    .cate-lv3-list{
      display: flex;
      flex-wrap: wrap;
      .cate-lv3-item{
        width: 33.3%;
        margin-bottom: 10px;
        display: flex;
        flex-direction: column;
        align-items: center;
        image{
          width: 60px;
          height: 60px;
        }
        text{
          letter-spacing: 0px;
          font-size: 12px;
        }
      }
    }
    }
  
  
}
</style>
